wpf - Layers issue using Z-Index -

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i've 2 controls 1 on top of another: border on slider. on border user can mark segment appear in different color on slider. because border written after slider in xaml, appear on top of slider. , that's ok. problem is, thumb of slider appears under border.

how can set thumb element (belong slider control , inside it) appear on top of all, , border appear on top of slider? tried use zindex without success. idea?

in css:

make sure elements positioned absolutely or relatively. z-index doesn't have play in layering unless elements positioned absolutely or relatively. should able set 1 with:

z-index: 1;

and other with:

z-index: 2;

and desired result.

in wpf:

use syntax specified here

here's example:

make sure both of elements in same parent, otherwise displayed in order in loaded.


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